Insulator cap



`Sept. 13, 1932. H, VAN ROSEN 1,877,594

In'suLAToR CAP Filed sept. 2:5. 1929 3 Sheets-Sheet 2 Sept. 13, 1932. H. "VAN ROSEN INSULATOR CAP' Filed Sept. 23', 1929 3 Sheets-Sheet 5 Patented Sept. 13, 1932 UNITED STATES PATENT IOFFICE HUGO VAN ROSEN, F BRIGHTON, MASSACHUSETTS, ASSIGNOR TO DELTA-STAR ELECTRIC COMPANY, A CORPORATION OF ILLINOIS INSULATOR CAP Application led September 23, 1929. Serial No. 394,535.

This invention relates to supports, and with regard to certain more specific features, to insulating supports for electrical equipment and the like.

e? Among the several objects of the invention may be noted the provision of a support comprising an insulator adapted to be mounted upon an insulator pin or the like and carrying a suitable cap or the like in connection `iqwith which is used a novel and improved fastening for holding that-which is to be mounted; the provision of a device of the class described which permits of making fastenings without breakage of the fasteniiings; and the provision of a device of the class described which is rugged, simple and economical, and entirely adequate to meet all service conditions. Other objects will be in part obvious and in part pointed out herein- 55 after. f

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structure hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated'several of various possible emf bodiments of the invention Fig. 1 is a plan view of one form of the invention;

Fig. 2 is a side elevation of Fig. 1, partly in section;

Fig. 3 is a horizontal section taken on line 3-3 of Fig. 2;

Figs. 4, 7, 9 and 12 are fragmentary views similar to Fig. 2 showing modifications;

Fig. 5 is a horizontal section taken on line Fig. 6 is a horizontal section taken on line 6-6 of Fig. 4;

Fig. 8 is a horizontal section taken on line 8 8 of Fig. 7;

"IT Figs. 10 and 11 are horizontal sections on coincident lines 10-10 and 11--11 respectively of Fig. 9, looking in opposite directions;

Fig. 13 is a cross section taken'on line fel, 13-13 of Fig. 12;

Fig. 14 is a view similar to Fig. 13 showing a modification; and,

Fig. 15 is a fragmentary view illustrating a sloping holding face.

Similar reference characters indicate corresponding parts throughout the several views ofthe drawings.

Referring now more particularly to Fig. l. there is illustrated at numeral 1 a porcelain or the like insulator suitably mounted upon a pin 3. Upon this insulator is held by cementing or otherwise a cap, top or the like 5. This cap 5, taken in combination with the holding means thereon comprises a novel part of this invention.

The cap 5 is formed with an upward extension 7 carrying a peripheral groove 9, whereby a flange or head or enlargement 11 is formed. The part to be held or supported. such as shown at numeral 13, is provided with suitable openings 15 for accommodating passage of fasteners or bolts 17, the heads or enlargements of which engage said groove 9. Between the part 13 and the head 11 is located a keeper 19 having suitable openings 21 for accommodating passage of the bolts 17 and provided with a keeper or holding flange 23 which, as in Fig. 2, may closely engage f outside of the bodiesof the bolts and extend downwardly only to the heads thereof; or, as shown in Fig. 4, may extend downwardly past said heads so as to enclose the same. In any case, one of the purposes of the keeper is to prevent bending and/or spreading of the bolts when they are drawn up.

Fig. 15 shows how the bottom face of the flange 11 may be sloped as indicated at numeral 25 in order to tend to force the bolts outwardly against the keeper openings and/or keeper flange 23 whereby tightness is insured.

assembly.

Early switch insulators used an ordinary line insulator to which was clamped a split clamp, sometimes padded with copper braid to distribute the pressure on the porcelain insulator. Vhen greater accuracy and strength of bond was needed a cap was cemented on, and this cap was tapped at fixed points for application of non-adjustable holding cap screws. Although the caps were galvanized, the threads corroded, and not always being in line, it was difficult to change the insulators. Cap screws were easy to break and delays occurred.

It will be noted that in Figs. 1, 2 and 3, the flange 11 is represented as being circular, and as a result the bolts hold a given peripheral location by friction. If more posit-ive locating means is desired, the flange 11 may be notched as indicated by numeral 27 in Figs. l and 5, to accommodate parts of the bodies of the bolts at optimum peripheral locations. Thus rotation of the keeper and part held is positively, instead of frictionally prevented.

Fig. G indicates how the openings through the keeper may be elongated peripherally, as indicated at numeral 29, in order to permit angular adjustment of the keeper and to facilitate assembly.

In Figs. 7 and 8 is shown a modification of the notched holding construction wherein the notches 31 are shaped angularly to fit the bolt heads 33 and are placed inside of the groove 9 instead of in the flange 11.

Another alternative construction is illustrated in Figs. 9 to 11 in which the opposing faces of the keeper and head' or flanges 11 are serrated or roughened or otherwise provided with coacting male and female members 35, 37 for preventing relative angular movement after the parts have been assembled and drawn up.

It will be seen that in effect the notches or irregularities give the head 7 a polygonal shape. This principle may be extended so that the flange 11 is enlarged externally to f form a square, hexagon or other form. Then the flange 23 of the keeper 19 may be similarly shaped circumferentially so that relative turning will not take place.

Figs. 12 to 14 show another modification in which the reeper flange is separate from the piece 19. In this modification, (Figs. 12 and 13) the keeper comprises a more or less plain ring 39 which is slipped' on the outside of the bolts 17 after the latter are in position with their heads in the groove 9. Then a plate or cap -1 having openings i3 accommodating the bolts is applied, after which the nuts are screwed on and pulled down. That which to be supported, such as the wire 45, is clamped to the member Ll1 by a screw-held saddle 4:7 or the like. It is to be understood that this construction may be made with plain unnotched flange 11 (Fig. 13) or a notched flange (Fig. 1li). l

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without dearting from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. In combination, a support comprising an insulator, a top thereon having an enlargement, a member adapted to be held, fasteners having enlargements joining said member and top, the enlargement of the fasteners being positioned at least partly enlargement and a keeper separate from said top and held in place by and adapted to hold said fasteners.

2. In combination, a support comprising an insulator, a top thereon having a groove, a member adapted to be held, a keeper between the said top and member, bolts holding said member having bodies and heads projecting into saidgroove, said bolts passing through said keeper, and a flange on the keeper encircling the bolts.

3. In combination, a support comprising an insulator, a top thereon having a groove, a member adapted to be held, a keeper between the said top and member, bolts holding said member having bodies and heads projecting into said groove, said bolts passing through said keeper, and a flange on the keeper encircling only the body portions of the bolts.

4. In combination, a support comprising an insulator, a top thereon having a groove extending around the entire periphery thereof, a flange above the groove, a member adapted to be held, a keeper between the said top and member, bolts holding said member having bodies and heads projecting into said groove, said bolts passing through said keeper, and a flange on the keeper encircling the bolts.

5. In combination, a support comprising an insulator, a top thereon having an enlargement, a member adapted to be held, fasteners having enlargements joining said member and top, the enlargements of the fasteners being positioned at least partly under said top enlargement, a separate keeper adapted to hold said fasteners and comprising a tube slipped over the top enlargement.

6. An insulator unit having a cap at one end thereof having a recessed extension, bolts lying along the outside of the extension with their heads in the recess, and a cylindrical member separate from the cap and surrounding the extension and the bolts, thereby holding the bolts in place.

7. An insulator unit having a cap at one end thereof having a recessed extension, bolts under said top lying along the outside of the extension with their heads in the recess, a cylindrical member separate from the cap and surrounding the extension and the bolts, thereby holding the bolts in place, and a member adapted to be secured to said insulator ca by said bolts, said member holding the cylindrical member against withdrawal from said extension.

8. An insulator unit having a cap at one end thereof, said cap being formed alon its outer peripheral ed to receive the heas of a plurality of hol ing bolts and including means for holding the bolts against upward withdrawal but ermitting removal of the bolts sidewards oi) the cap, and means mounted in place on the insulator cap by said bolts and including a cylindrical rin portion surrounding the outer portion o the cap and holding said bolts against outward withdrawal.

In testimony whereof, I have signed my name to this specification this eleventh day of September, 1929.

HUGO VAN ROSEN. 

